Ovulation, I’m confused 🤷🏻‍♀️

Ok, I didn’t want to ask because I didn’t want to feel dumb, but I need help, I haven’t ovulated (or at least didn’t catch it when tracking) these last 3 years that we have been ttc. I tried a couple new things this cycle. I had never even had any other color besides that super tiny almost non existing at all faint color line almost that you get when your opk is negative. This month however I noticed the color in lines kept changing a bit.

I know one shows on the app as “positive” but I don’t think it is yest. I’m confused as why is it darker at times and then lighter some other times. Even if the tests were done at the same time.

Seems possible that this cycle I might ovulate right?